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Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Distributions - common stock      
Cash per share (in dollars per share) $ 1.46 $ 1.80 $ 1.80
Stock per share (in dollars per share) $ 0.34